Bump version to 3.5.1 (Gargron)
https://github.com/mastodon/mastodon/pull/18000

Fix error resposes for `from` search prefix (single-right-quote)
https://github.com/mastodon/mastodon/pull/17963

Add v3.5.x to SECURITY.md (ykzts)
https://github.com/mastodon/mastodon/pull/17998

Fix dangling language-specific trends (Gargron)
https://github.com/mastodon/mastodon/pull/17997

Auto-fill timeline gaps when getting re-connecting to Websocket/EventSource stream (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17987

Fix extremely rare race condition when deleting a toot or account (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17994

Change e-mail notifications to only be sent when recipient is offline (Gargron)
https://github.com/mastodon/mastodon/pull/17984

Fix trends returning less results per page when filtered in REST API (Gargron)
https://github.com/mastodon/mastodon/pull/17996

Bump i18n-tasks from 0.9.37 to 1.0.8 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17993

New Crowdin updates (Gargron)
https://github.com/mastodon/mastodon/pull/17897

Fix cookies secure flag being set when served over Tor (Gargron)
https://github.com/mastodon/mastodon/pull/17992

Bump gitlab-omniauth-openid-connect from 0.5.0 to 0.9.1 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17779

Bump fabrication from 2.27.0 to 2.28.0 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17960

Bump lograge from 0.11.2 to 0.12.0 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17961

Fix migration error handling (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17991

Fix error re-running some migrations if they get interrupted at the wrong moment (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17989

Fix pagination header on empty trends responses in REST API (Gargron)
https://github.com/mastodon/mastodon/pull/17986

Fix potentially missing statuses when reconnecting to websocket (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17981

Fix failure when sending warning emails with custom text (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17983

Fix unset `SMTP_RETURN_PATH` environment variable causing e-mail not to send (Gargron)
https://github.com/mastodon/mastodon/pull/17982

Fix older items possibly disappearing on timeline updates (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17980

Add pagination for trending statuses in web UI (Gargron)
https://github.com/mastodon/mastodon/pull/17976

Fix possible duplicate statuses in timelines in some edge cases (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17971

Fix spurious edits and require incoming edits to be explicitly marked as such (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17918

Fix error when encountering invalid pinned posts (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17964

Remove sign-in token authentication, instead send e-mail about new sign-in (Gargron)
https://github.com/mastodon/mastodon/pull/17970

Fix inconsistency in error handling when removing a status (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17974

Fix admin API unconditionally requiring CSRF token (ClearlyClaire)
https://github.com/mastodon/mastodon/pull/17975

Fix `GET /api/v1/trends/tags` missing `offset` param in REST API (Gargron)
https://github.com/mastodon/mastodon/pull/17973

Bump sass from 1.49.9 to 1.49.11 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17959

Bump prettier from 2.6.1 to 2.6.2 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17958

Bump redis from 4.0.4 to 4.0.6 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17957

Bump sidekiq-unique-jobs from 7.1.15 to 7.1.16 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17956

Bump react-redux from 7.2.6 to 7.2.8 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17955

Bump ox from 2.14.10 to 2.14.11 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17954

Bump pg from 1.3.4 to 1.3.5 (dependabot[bot])
https://github.com/mastodon/mastodon/pull/17953

fix: returns nil instead of empty URL on status.application.website (rinsuki)
https://github.com/mastodon/mastodon/pull/17962

Replace deprecated String.prototype.substr() (CommanderRoot)
https://github.com/mastodon/mastodon/pull/17949

Update en.yml (unextro)
https://github.com/mastodon/mastodon/pull/17942